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Finding the Fourth Proportional to 21,617.67, 32,211.60 and 19,259.55

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Solution

The fourth proportional to 21,617.67, 32,211.60 and 19,259.55 is: 28,697.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,617.67 : 32,211.60 = 19,259.55 : x
  2. Step 2: Convert to fraction form
    21,617.67/32,211.60 = 19,259.55/x
  3. Step 3: Cross multiply
    21,617.67x = 32,211.60 × 19,259.55
  4. Step 4: Simplify right side
    21,617.67x = 620,380,920.78
  5. Step 5: Solve for x
    x = 620,380,920.78/21,617.67
  6. Step 6: Final answer
    x = 28,697.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.